General
Manufacturer	ESL
Degree of protection	IP20
Characteristic	B
Nominal current	25 A
Number of poles	1
System	Compact
Terminal clamp	patented pressure plate
Maximum conductor cross-section	35 mm²
Approvals	DIN VDE 0100-430, DIN VDE 0100-530, DIN VDE 0641-11, IEC/EN 60898-1, DIN VDE 0660-101, IEC/EN 60947-2, UL1077

The S201-B25 circuit breaker from ESL belongs to the S 200 series and is a 1-pole circuit breaker with B characteristic, designed for use in System Compact. It protects cables and wiring against overload and short circuit in accordance with standards DIN VDE 0100-430 and DIN VDE 0100-530. The device complies with construction regulations DIN VDE 0641-11 as well as IEC/EN 60898-1, DIN VDE 0660-101 and IEC/EN 60947-2, and is also UL1077-certified, highlighting its suitability for worldwide use. The patented connection terminal allows for simple and secure connection via a pressure plate, simplifying installation and maintenance.

Applications

The S201-B25 is designed for use in electrical distributions within the field of building electrotechnics. It protects electrical wiring in residential and commercial buildings as well as in industrial installations. The B characteristic ensures a balanced response to overloads and short circuits, making it suitable for typical consumer installations with medium to high loads. The System Compact mounting technology enables compact installation in distribution boxes and allows use in standard installation systems.

Functions and Equipment in Detail

The circuit breaker features a connection terminal that directly connects conductors up to 35 mm² to the device. The terminal is insulated and provides protection class IP20, ensuring safe handling during installation. The connection opening for wiring is located above the connection opening for the phase bar, providing better visibility during wiring. The B characteristic ensures defined tripping behavior under overload conditions, with the breaker tripping within 1 hour at current values exceeding 1.13 times the rated value and reacting within 0.1 seconds at 5 times the rated value.

Technology Explained Simply

The B characteristic is a standard characteristic for circuit breakers, suitable for applications with low to medium transient loads. It prevents unnecessary tripping during short-term current surges, such as those occurring during motor or heater startup, while still ensuring safe disconnection during sustained overloads or short circuits. The protection class IP20 means the device is protected against contact with solid objects up to 12.5 mm and against vertically falling water droplets, which is sufficient for indoor use. The patented pressure plate of the connection terminal ensures a secure and reproducible connection without requiring additional tools.

Compatibility and Accessories

The S201-B25 is designed for System Compact and can be combined with various accessories to optimize installation. These include busbars such as PS3/6, PS3/9, and PS3/12 with end cap, as well as row terminals such as CMS-102PS and CMS-101PS. For wiring, three-phase sets such as the 710SPM with a cross-section of 10 mm² and a length of 1056 mm are also available. The PS3/60 busbar is available as a 3-phase bar for cutting to length, enabling flexible adaptation to the respective distribution configuration.

Installation and Mounting

Installation is carried out in standard distribution boxes that support System Compact. The connection terminal allows direct connection of conductors up to 35 mm², with the terminal insulation ensuring safety during handling. The arrangement of the connection openings (wiring on top, phase bar below) facilitates wiring and reduces error sources. The pressure plate of the terminal enables quick and secure fastening without additional tools. The System Compact mounting technology ensures compact and orderly installation in distributors.

Operational Advantages

The S201-B25 provides reliable protection for electrical wiring and reduces the risk of fires caused by overload or short circuit. The B characteristic ensures a balanced response, guaranteeing both safety and availability of the electrical installation. The patented connection terminal and the clear arrangement of the connection openings improve installation efficiency and reduce error susceptibility. The approvals according to DIN VDE, IEC/EN, and UL1077 enable use in various markets and application areas.